Sick Leave and Absence Rate of Hospital Workers During the Sixth to Eighth Wave of COVID-19 in Japan

There are several reports of breakthrough infections of severe acute respiratory syndrome coronavirus 2 in vaccinated individuals and reinfections in previously infected individuals. Although the coronavirus disease (COVID-19) pandemic has increased the incidence of infections at healthcare facilities, the association between the increase in community spread and absence rate of hospital workers due to COVID-19 infection-related sick leave has not yet been fully elucidated. We reviewed the case files of patients with COVID-19 diagnosed at the Jikei University Katsushika Medical Center, Tokyo, Japan, between January 1, 2022, and February 28, 2023. The obtained data was used to determine the number of COVID-19 admissions and absence rate of hospital workers due to COVID-19 infection-related sick leave during the sixth to eighth wave of the COVID-19 pandemic. Of 1899 patients with confirmed COVID-19, 397 (20.9%) were hospital workers. Of the 397 patients, 71, 156, and 119 contracted the infection during the sixth (January–March 2022), seventh (July–September 2022), and eighth wave (November 2022–February 2023), respectively. The absence rate of hospital workers due to COVID-19 was 6.3%, excluding leaves of absence due to close contact in the seventh wave, which had the highest number of infections. Given the difficulty of maintaining a usual work schedule during the COVID-19 outbreak, it may be necessary to re-evaluate the backgrounds of healthcare workers at high risk of contracting COVID-19 and to make aggressive adjustments to their work schedules by distributing assignments and restricting leave.